AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

|
Ziad
August 15, 2007 04:36PM
Hi Erin,
It looks like there is a problem with your design matrix and specifically with your task regressors. It maybe as simple as two regressors that are almost the same, or even identical. It maybe as complicated as one regressor being a linear combination of other regressors. You need to plot the design matrix and examine it to determine the problem's source.

cheers,
ziad
Subject Author Posted

collinearity problem - please explain

Erin August 15, 2007 02:10PM

Re: collinearity problem - please explain

Ziad August 15, 2007 04:36PM

Re: collinearity problem - please explain

Erin August 16, 2007 11:59AM

Re: collinearity problem - please explain

bob cox August 16, 2007 12:15PM

Re: collinearity problem - please explain

Erin August 16, 2007 12:38PM

Re: collinearity problem - please explain

bob cox August 16, 2007 02:54PM

Re: collinearity problem - please explain

Erin August 27, 2007 08:40AM